You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Ad Age Digital A-List: Virgin America A Rarity for Its Industry, Airline Has Attracted a Fervent Fan Base, Flying on the Wings of Strong Twitter Presence, Groupon Partnership and Onboard Digital Offerings By Michael Bush, Published on February 27, 2011 2 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.